A Greenfield Center man pleaded guilty to vehicular assault on charges stemming from a head-on crash in December when he seriously injured another motorist while driving drunk, the Saratoga County District Attorney's office said Friday.

Jeffrey Davenport, 23, was driving north on Middleline Road in the town of Milton on Dec. 9 when he veered into the southbound lane and collided with a vehicle driven by Kristina Giammusso. Giammusso broke her back and continues to struggle through a long-term rehabilitation, prosecutors said.

Davenport was found to have a blood alcohol content of 0.18 percent, over twice the legal limit.

"She will never fully recover," said District Attorney James A. Murphy III. "While the defendant was on his way home from a night of partying and drinking, she was on her way to work at 5 a.m. It's so unfair that such a hardworking, bright young woman has to suffer because of his criminal conduct."

Murphy said that his office would seek the maximum prison term of four years in state prison at the June 28 sentencing.

In addition to a 1 1/3 to 4 year prison term, Davenport would be required to install an ignition interlock device in his vehicle to prevent drunken driving upon his release for three additional years, Murphy said.